Heel.



U. MAHLER.

' HEEL. APPLICATION FILED APR. 12. 1911.

Patented Nov. 1 1, 1911.

UNITED STATES PATENT OFFICE.

UHLICH MAHLER, OF SAN FRANCISCO, CALIFORNIA.

HEEL.

To allwhomitmay concern: f Be it known that I, UHLIGH MAHLER,-Cltlzen of Canada, residing in the city and county of San Francisco and State of Cali-' fornia, have invented new and useful Improvements in Heels, of which the following is a specification.

, This invention relates to heels, and particularly to rotary heels for shoes.

provide a practical, -durable, self-cleaningrotary heel for shoes, and to provide a heel of such const-ructioliand design as to employ the least number of elements possible.

The invention; consists of the parts and the combination-and construction of parts as hereinafter inore' fully described and claimed, having reference to the accompanying -drawings -,t;iniwhich-' T Figure'l is a 'ertical section through-the heel Fig. 2 is'an underneath 'plan'view of the stationary member. Fig. 3 is,aperspective View of, the turn-table plalte. Fig}; is a perspectiveview of thescrew. v

In the illustr'ted embodimentiof my. invention, 2.indicate s a portion ofa shoe or slipper, to the'lower hcel portion of-which is connected 1a stationary heel section 3,

which may be ofany suitable material, such as rubber, .leather, wood, fiber, etc., and which is jattached to the shoe by means of screws or nails 4 insertible through per-f0.- 1 rations 5 provided-for theirreceptionin the stationary section 2. a o i v -..The-salient and important feature .of the present invention is the means for attaching to and supporting against the stationary section of the heel, a. turnable circular. or othera wise shaped, wearing section 6, which may be of suitable proportions as regards height and diameter, and which is adapted to revolve freely so as to constantlypresent its wearing surface in different angular positions for the purpose of insuring a' substantially uniform and even degree of wear on its lower surface. Another important feature of the presentinvention is to provide a turnable heel which may be cheaply and easily manu- I facture-d, and which will be permitted to revolve with great freedom.

t v In accomplishing these purposes I provide and insert into the lower surface of the stationary section of the heel a metallic or other plate 7, of suitable diameter andthick- The object of the present invention is to Specification of Letterslatent. Patented N0". 14:, 1911. Application filed April 12, 1911. (Serial No. 620,577.

ness, and which maybe notched, as at 8, so as to be better secured against movement on the section 3'. In the'present. instance the plate 7 is shown asinserted in the stationary member 3 so as to form a recess or depression having beveled edges 9 formed by the material of the section 3. This plate 7 is provided with an annular raceway 10, which -may be semicircular in cross section or V- shaped, or otherwise designed, and in which is adapted to run a. series of antifrictional devices, as, for instance, balls 11, which are held in their raceway 10 by the turnable heel section 6.

The turnable heel section 6 is pivotally connected to the stationary section 3 by means of a'cent-ral stud, here indicated as a screw 12, inserted from the top of the stationary member 3 and having its head 13 filling a recess 14 formed for its reception .in the upper surface of the stationary heel section 3. Preferably the material of which ,the section 3 is formed projects beneath the head 13 of the. screw and nearly contacts ;with the shank of the screw 12. The object of providing this material beneath the head in the racewayv 10,-and by reason of the packing beneath the head 13 of the screw, all rattle of the heel section 6 is prevented.

In order to provide for ample engagement with the threads of the screw 12, the bearing plate '15 is somewhat depressed at its central portion forming a collar or flange threaded, as at 16, to receive the screw, and this plate 15 may be appropriately secured in the heel 6, which may be of any suitable material, as rubber, leather, fiber, wood, etc.

in the present instance I have shown the wearing plate 15 as provided with integrally formed spurs 17, which mav he punched upwardly from the body of the plate. and which are adapted to be driven or otherwise secured in the material of which the turnable heel section 6 is formed.

In operation, the stationary member 3 is placed rpwardly against the bottom of the shoe 2 after the screw 12 has been in erted through the opening provided for its reception, and then the section 3 tar-lied, or

otherwise secured, to the shoe. The shoe with the stationary portion attached is then turned over so that the screw 12 projects upwardly through the stationary member 3, and the balls 11 are arranged in the raceway 10, after which the turnable section 6 is threaded down over the screw 12 until it has a reasonable free running motion upon the balls 11. The screw is prevented from revolving when the heel section 6 is screwed on by inserting in a slot 18 in the point. 0 the screw a screw-driver holding the screi' against rotation.

Aften'the heel has been screwed to the desired position, a tool may be inserted through the opening 1!} in the center. of the turnable section 6 until it bears against the edge of the threaded portion 16 of the wearing plate 15, and by giving the tool a slight blow with a hammer, the threaded portion 16 will be depressed into one of the slots 20 formed in the sides of the screw 12, thus keying the turnable section 6 to the screw 12 so that the latter will revolve uniformly with the heel section 6 and also be prevented from unscrewing.

This heel, as here described, will be selfeleaning during the time of its service by reason of the downwardlybeveled edges 9 of the stationary section 3, which permit sand, dust. andother material which may have worked its way between the working joint of the movable section and the station ary section to gradually sift outwardly and downwardly, and this self-cleaning action may be enhanced by bcveling the upper circumferential edge of the turnable heel 6.

The opening 19 in the tread member 6 maybe closed by cementing or otherwise attaching a filler or plug 21 insertible in the heel.

llaving thus described my invention, what I claim and desire to secure by Letters-Patent, is-

1. A rotary heel comprising a stationary member, a turnable tread member, a wearing plate, carried by the tread member, antifriction elements between the stationary member and the wearing plate, and a screw carried by the stationary member and having threaded engagement with said wearing plate and being keyed thereto so asto turn therewith.

2. A rotary heel comprising a stationary member, a turnable tread member, a wearing plate carried by the t1'cad.incmber, antifriction elements between the stationary member and the wearing plate, and a screw carried by the stationary member and having threaded engagementwith said wearing plate and being keyed thereto so as to turn therewith, said screw having an enlarged head and said stationary member having a recess to receive said head.

3. A rotary heel comprising a stationary member, a turnable tread member, a Wearing plate carried by the tread member, antifriction elements between the stationary member and the wearing plate, and a screw carried by the stationary member and having threaded engagement with said wearing plate and being keyed there to so to turn therewith, said screw having a nick in itsouter end, and said tread member having an opening for the screw affording access to the nick thereof.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

UI'TLTCTI bl A 1 [LE lt.

lvitnesses Cnaumcs EDELMAN, C. C. Coon. 

